Version 4
SHEET 1 880 680
WIRE -32 32 -144 32
WIRE 80 32 48 32
WIRE 208 32 160 32
WIRE 320 32 208 32
WIRE 368 32 320 32
WIRE 208 96 208 32
WIRE -144 112 -144 32
WIRE -16 112 -16 80
WIRE 320 112 320 32
WIRE -144 240 -144 192
WIRE -16 240 -16 192
WIRE -16 240 -144 240
WIRE 32 240 32 80
WIRE 32 240 -16 240
WIRE 208 240 208 176
WIRE 208 240 32 240
WIRE 320 240 320 176
WIRE 320 240 208 240
WIRE -144 320 -144 240
FLAG -144 320 0
FLAG 368 32 VOUT1
SYMBOL res 64 48 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R1
SYMATTR Value 3k
SYMBOL res 192 80 R0
SYMATTR InstName R2
SYMATTR Value 1k
SYMBOL voltage -144 96 R0
WINDOW 0 -50 10 Left 2
WINDOW 3 -60 104 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 12
SYMBOL cap 304 112 R0
SYMATTR InstName C1
SYMATTR Value 1�
SYMBOL sw 64 32 M270
SYMATTR InstName S1
SYMBOL voltage -16 96 R0
WINDOW 0 -46 7 Left 2
WINDOW 3 24 96 Invisible 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value PULSE(0 1 0 100n 100n 6m)
TEXT -128 288 Left 2 !.tran 14m
TEXT -128 264 Left 2 !.model SW SW(Ron=.01 Roff=1G Vt=0.5 Vh=0)
